Apparatus for making frames for mine-cages and the like.



No. 823,711. PATENTED JUNE 19, 1906 P. THIELMANN & J. MEISENBURG.APPARATUS FOR MAKING FRAMES FOR MINE GAGES AND THE LIKE.

APPLICATION FILED JAN. 24, 1905.

MIA 8859; %Z/% zap-6%;

. UNITED STATES PATENT oFFIcE.

TETER THIELMAN-N AND 'JOHANN MEISENBURG, OF DUISBURG, GERMANY. APPARATUSFOR MAKING FRAMES FOR MINE-CAGES AND THE LIKE.

Specification of Letters Patent.

Patented June 19, 1906.

Application filed January 24, 1905. Serial No. 242,631.

To aZZ whom it may concern:

Be it known that we, PETER THIELMANN,

residing at 29 Fisherstrasse, and JOHANN MEISENBURG, residing at 2Sternbuschweg, in the city of Duisburg, in the Kingdom of Prussia,German Empire, subjects of the Ger- 'man Emperor, have invented certainnew making seamless rectangular ironframes for mine-cages and, the likefrom rolled or other weldless rings. 1

One form of the apparatus is illustrated in the accompanying drawings,in which Figure 1 is a plan of the apparatus, the top plates beingremoved, and Fig. 2 a vertical section thereof. Fig. 3 is a plan viewillustrating the use of the apparatus.

The apparatus consists of two pressurecylinders a b in connection with ahydraulic pump (not shown on the drawings) from which pipes a b conductto the cylinders. Located above the cylinders are plates 0 d, guided insuitable manner. Each of the pistons e f is connected with a strongcross-head g h, respectively. Within these cross-heads are locatedspindles i 7c, having right and left handed threads, and on thesespindles travel the pins Z m, which project through slots in the"cross-heads and other slots 0% 0 in the plates 0 d. The screw-spindles7', 7c may be turned by handles p g, fitting over square heads providedfor the purpose.

r The mode of operation is as follows: By turning the handles p q thebolts z-m are first adjusted on the spindles until they occupy atherein, vertical I position exactly-corresponding to the width of therectangular frame being made. The ring 1" in red-hot state is then laidover them. Thereupon. the pump is worked and the pressure-water enteringthe cylinders forces the pins m I outward to the left "and right hand,respectively. When the pins have arrived in the positions Z mcorresponding to the dimensions of the rectangle r to be manufactiued,as shown in Fig. 3, the pressure is removed and the pistons retracted,whereupon the rectangle r can readily be lifted oif and, if

necessary; finished off by hand or otherwise.

It will be obvious that in place of a hydraulic plant the apparatus maybe actuated by pneumatic pressure or by other suitable means.

Having thus described our invention, we claim- Apparatus fortransforming seamless rings into rectangular frames for mine-cages andthe'like, comprising two parallel cross-heads, right and left handscrewed spindles turning pins traveling on the spindles, slottedplatforms through each ofwhich one pin of each cross-head projects,pistons connected with the cross-heads, and pressure-cylinders in whichthe pistons work, substantially as described.

In witness whereof we have hereunto signed our names, this 10th day ofDecember,

1904, in the presence of two subscribing witnesses.

PETER THIELMANN.

JOHANN MEISENBURG.

Witnesses: I

PETER LIEBER,

WILLIAM ESSENWEIN.

